Negative-Parity Baryons in Quenched Anisotropic Lattice QCD
Abstract
We study negative-parity baryon spectra in quenched anisotropic lattice QCD. The negative-parity baryons are measured as the parity partner of the ground-state baryons. In addition to the flavor octet and decuplet baryons, we pay much attention to the flavor-singlet negative-parity baryon as a three-quark state and compare it with the Lambda(1405) baryon. Numerical results of the flavor octet and decuplet negative-parity baryon masses are close to experimental values of lowest-lying negative-parity baryons, while the flavor-singlet baryon is much heavier than Lambda(1405). This indicates that the Lambda(1405) would be a multi-quark state such as the N-Kbar molecule rather than the flavor-singlet 3 quark state.
Keywords
Cite
@article{arxiv.hep-lat/0312033,
title = {Negative-Parity Baryons in Quenched Anisotropic Lattice QCD},
author = {Y. Nemoto and N. Nakajima and H. Matsufuru and H. Suganuma},
journal= {arXiv preprint arXiv:hep-lat/0312033},
year = {2009}
}
Comments
4 pages, 4 figs. Talk given at 16th International Conference on Particles and Nuclei (PANIC 02), Osaka, Japan, 30 Sep - 4 Oct 2002